Adjustable multiple spindle head



Aug. 26, 1952 SPECKIN 2,608,112

ADJUSTABLE MULTIPLE SPINDLE HEAD Filed D80. 16, 1949 2 SHEETS-$HEET 1 1NVEN TOR,

Patented Aug. 26, 1952 ADJUSTABLE MULTIPLE SPINDLE HEAD Alfred P.Speckin, Cincinnati, Ohio, assignor to United States Drill Head 00.,Cincinnati, Ohio,

a partnership Application December 16, 1949, Serial No. 133,337

17 Claims.

The present invention relates to an adjustable multiple spindle head fordrilling machines, and is concerned particularly with the problem offurnishing adjustment means for the several spindles of the drill head,whereby said spindles each may be located at any desired positionrelative to the work-piece, for accurately drilling the work-piece, orperforming other machine operations thereon, such as tapping, reaming,and the like.

One of the objects of the invention is to provideeasily and quicklyadjustable spindle structures for a multiple head, so designed as toattain a higher degree of accuracy in drilling or tapping, than has beenpossible with the use of any adjustable multiple spindle head heretoforeproposed.

Another object of the invention is to improve the spindle housing designin the interests of rigidity, durability, and resistance to wearing ofthe parts.

Another object is to provide a multiple spindle structure of thecharacter stated, having maximum flexibility in the locating of thespindles and their tools relative to the work-piece.

A further object is to provide effective and reliable clamping means forfixing the spindles relative to predetermined points on the workpiece tobe operated upon.

Other objects of the invention are: to incorporate, in a machine of thecharacter stated, a reduced number of constituent parts resulting insimplification of the head; to reduce the weight of the device; tosimplify and expedite assembly of the device at the factory; to simplifyand expedite adjustment of the spindles by the user ofv the device; andto provide for effective lubrication of all encased parts requiringlubrication.

The foregoing and other objects are attained by the means describedherein and illustrated upon the accompanying drawings, in which:

Fig. 1 is a fragmental cross-sectionalview taken on a vertical planepassing through the center of the improved adjustable multiple spindledrill head of the invention.

Fig. 2is a cross-sectional view taken on line 2-2 of Fig. 1'.

Fig. 3 is a view similar to Fig. 1, showing a modification of the drillhead.-

Fig. 4 is a diagrammatic view, on a greatly reduced scale, of a typicalmultiple spindle head, and showing various adjusted positions of thetool spindles.

Fig. 5-is a perspective view of a clamp head, a part of the-Fig. 3device. 7

As will be understood, the head herein disclosed is adapted for mountingupon the quill or other reciprocable part of an ordinary single spindledrilling machine, which latter includes a rotatable spindle socket todrivingly engage the tapered main shaft 6 of the head. Thus the head maybe moved bodily toward and from a table supporting the work-piece, whileat the same time the several spindles of the head are rotated in unisonby the rotating spindle of the drilling machine, all in accordance withcommon practice in the art. I y

Referring now to Figs. 1 and ,2- of the drawings, 1 indicates the toolspindle-socket or holder, to be rotated by the main shaft 6 through atrain of gears to" be described. The gear head which carries the toolholder 1 andits driving means, may carry additional t'ool holders asindicated at 1 upon Fig. 4, all driven from the same main shaft 6. Headsmay be constructed with one or more adjustable tool holders, dependingupon the size of the head and the nature of the work to be performed. Insome instances, the head may carry one or morev adjustable'tool holders,and one or more non-adjustable tool holders, all driven from the samespindle. Moreover, the head may 'be circular as shown in the embodimentillustrated, or it may be made square or oblong, or of some othercontour, as desired.

The gear head as usual, houses sets of spindle driving gears and maycomprise a heavy flat metal plate or body member 8 (Fig. 1), ofsubstantial thickness, furnished with transverse large bores 9corresponding in number to the number of adjustable spindles and toolholders to be incorporated in the head. Each bore 9 may be counterboredas shown, to provide an annular shoulder i0 therein adapted to limitupward movement of a cylindrical drum or plug 12 fitted in thebore'foryrotational adjustment. The drum or plug I2 may conveniently bemade the same thickness as the body member 8.

Drum 12 may be bored centrally thereof, as at I3, and counterbored, toaccommodate a counter-shaft gear 14 and a bearing [5 for one end of thecounter-shaft l6, the opposite end of said shaft being journaled in asuitable bearing I! mounted upon a cover member l8 for the gearing. Asecond counter-shaft gear I9 is fixed to shaft [6 and occupies the spacebetween the cover member and the body member of the head. Gear 14 alsois fixed to the shaft i6, so that'the shaft and the gears I4 and I9 mayrotate in unison. As will readily be understood by referring to thedrawing, the counter-shaft gears are 22 for an intermediate portion ofthe shaft,

whereas the lower end of the shaft extends downwardly into the bodymember or plate 8, where a suitable bearing 23 may be provided. Fig. 3shows an obvious variation, at 23'. A

thrust bearing for the main shaft "is indicated conventionally at 25,and this as well as the bearings 22 and 23, may be of the anti-frictiontype. The lower end of the main shaft may be adapted to carry a drill orother tool, if desired. From the under side, the drum I2 is drilled toprovide an opening 25 receptive of an idler gear 21 in mesh with thecounter-shaft gear I4. This idler Jgearis rotatable upon anidler shaft28 which is rigidlyifattached to .the drum l2 at itsu'pperrend. Themounting of. the idler shaft upon the drum may beefiected in anysuitable manner, as by means of a screw 29 driven between the shaft andthe wall of the opening 3 which. receives theshaft. .It is possible, ofcourse, to 'make 'a drive fit between the. shaft and the opening 30,orft'o effect the connectionby' means of screw threads or equivalentmeans. The shaft 28 is at right 'angles'to the plane of the drum, andparallel to the counter-shaft [6. To provide for free rotation of idlergear 2'! upon its shaft, roller bearings 31 or otheranti-frictionbearing means may beprovided.

The character 32 indicates a spindle housing in the form of ablockhaving :a bore .33 accommodating the tool holder spindle shaft 34,and a second bore 35 receiving'the idler shaft 23. These bores areparallelto one another. and to the counter shaft IS. .The housing 32 isadapted to be swung about the idler shaft 28', when the locating plate36 is removed, through a full 360 degrees. The drum l2 likewise mayberotated in its bore 9 and about the central. shaft 16, to the extent of360 degrees. .These movements may be executed independently 'of'on'eanother, for the purpose of locating the tool holder 1 to an infinitenumber of points upon 'a work-piece adjacent the tool holder.

In the embodiment illustrated by Fig. 1, the

housing 32 is bored at 31 to accommodate the lower end of the idler gear21', the gear resting upon a. washer 38 at the base of the bore; Theidler shaft 28 fits loosely in the bore 35 of the spindle housing, sothat the housing may be swung about said shaft, andto prevent the"housing from dropping off the lower end of the idler shaft, a suitableretaining rneans in'ay be provided, for example, inthe form of. a pivotpoint screw 39 having itsi'n'n'er end riding in an annular groove -4C!of the shaft. Tlie lower end 'of the idler shaft is indicated-at 4'|,and it may substantially bottom in the bore "35, as shown. :An extension42 of the bore 35'is internally threaded as indicated, whereby a stud 43may be securely anchored in the spindle housing for a purpose'to beexplained. 1

As the drawing clearly indieates, the'upper'most teeth 44 of idlergen-1:1fa e' oonstanu n mesh with the teeth of counter-shaft gear l4,whereas the lowermost teeth 45'are' in' constant meshwith the teeth of aspindle gear '46 which is fasten the spindle shaft 34. The tool Holder1, of course, is fast on the spindle shaft or made integral therewith.Suitable bearings 41 and 48 mounted 4 in the counter-bored ends of thespindle housing, provide the necessary lateral support for the rotatingspindle shaft. A nut 49 threaded onto the upper end of the spindle shaftprovides for easy replacement of Spindles by simply removing thelocating plate 36, loosening the screw 39 to drop the'housing 32, andremoving the cover disc 50' which permits access to the spindle nut. Anannular or cylindrical bushing 5| fits partly into the housing bore 31and partly into the drum bore 26, to establish an effective swivelconnection between the spindle housing and the drum.

Suitable means are to be provided for precluding downward displacementof drum l2 from its bore 9 in the body member. This may be accomplishedin various ways, as by means of a circular disc or ring 52 fastened asat 53 to the upper face of the drum, with the marginal edge 5 t of thedisc or ring overlying and resting upon the upper a e .55 eit ie pdy mals Th oerfa of ho odrmem s eedibe r i sar pr r bl a .a -nreriqa rs e a t9si plify retention of the. d 'ru ms by their respective retaining ringsor discsfiql. It may be nlo't'edthajt the rings or discs 54 and thebearing plate 24 are perforated at Stand 51 tofacilitate assembly of thehead'and to ensurepassageoflubricant 'frein the gear housingspace 58 tothe several gears i4, 21, and 46, and their shaft s asonings. wh a dr ln o tanpi aon raim i jwb performed, it is necessary to securely clampthe spindle housing against rotation-about the idler shaft 23, and infact 'againstany movement whatever. In the Fig. l devicethis. clampingis ieffected by tighteningthe stud nut liji which binds the relativelylarge area of the lower face fl of the spindle housing securely againsttherilgid l a at as. t is to b uedert eei t th locating plate willusually be substantiallyfcoextensive with the outline of body member :3,and will be. suspended therefrom; by meansgf ajplurali y of hanger boltshaying. thi jl lld anchored securely to the body member hanger nuts 6-!onthe lower ends of bolts 62 may be drawn up tightlyenough, -if-desired,to-force the upper end of the spindlehousing into ijrm abutment with thelower faces 64 and 5 of the body member or head 8, and the drum Hrespectively, thereby to clamp the drum against possible rotation duringthe drillingortapping p a o. v The clamping means above explainedis'very simple and highly effective te ensure'great er than usualaccuracy inthe performance of drilling and tapping operations; notableimportance also, is the fact that the spindle housing directly abovethespindle axis.; bears solidly against the heavy body member d the heavydrum l2, throughout the .COHlfSg e e-dri-lling or tapping operation,thereby to eliminate pompletely anye dency vto bend t e. i le sh f .botherwise distort the parts to throwthe spindle and the tool off theexact-vertical line of travel; as the tool is driven forcefully i-nto;the. work by descent of the head toward the Work-piece. Thisjs a highlyimportant gconsideration in precision drilling, tapping, and reamingoperations.

To adjust thesbin'dleahd tool holder-t0 therequirements of differentjob's,"the operatorrembves the nuts (ill and;6;l,'tlierebyfrelasing'tli'e-loeating plate for bodily rem v'al f'rbm the "hanger bolts 62.After the rotating pla-te-isr'iridyeetrie spindle housing may be rotatedabout t eme: shaft 28, and -the drum 2 maybe, fotated' 'i'n its bore 9to revolve the idlersliaft'abbuttlfe axis of countershaft l6 asindicated by the arrows applied to Fig. 2, thereby enabling the operatorto position the tool holder over any given point on the work-piecewithin the range of lateral extension of the spindle housing. After allthe spindles are so adjusted to the desired operating position, a newlocating plate properly perforated to accommodate the bearings 41. andthe studs 43 of the several spindle housings of. the head, is applied tothe hanger bolts 62, and the nuts 6! and '50 are then applied and drawnup tightly to securely clamp the several spindles in the newly adjustedpositions. At will be understood, a different or a modifiedlocating'iplate 36 will berequired for each individual drilling job.That is, the character of the work-piece determines the design of thelocating plate,.and the spindles are adjusted to the requirements setforth by the design of the locating plate. This may readily beappreciated by referring to Fig. 4, which illustrates in plan a typicalrearrangement of tool holders I, with the spindle housings 32 and drumsl2 rotated to various relative positions. Fig. 4, and Fig. l as well,indicate that the centers of the several drums are equidistant from theaxis of the main shaft 6; however, by incorporating in the head agreater number of gears in the train between the main shaft and theidler shaft 28, any given drum may be located at a different distancefrom the main shaft axis. This may be accomplished also by changing thesizes of the gears of the train, or by providing takeoff gears meshingwith any one of the gears of the train. Such modifications may well beconsidered within the skill of the designer.

The modified form of the device illustrated by Fig. 3 is the same asthat of Fig. 1, except for the means employed for clamping the spindlehousing in predetermined positions of adjustment. Accordingly, it shouldbe unnecessary to repeat in detail the relationships and functions forthe parts which are common to both forms, Wherefore such common partshave been given the same reference numerals in Fig. 3, as they carry inFig. l, with the numerals primed in Fig. 3. Only the principal partsarenumbered in Fig. 3, to generally indicate the correspondency with thesame parts in Fig. 1.

It will be noted, with respect to Fig. 3, that the spindle 34' is drivenby the main shaft 6 through the agency of the gears 21', l9, i4, 21' andand 46'. The idler shaft 28 carrying the long idler gear 21", passesloosely through the upright bore of the spindle housing 32', and has itsupper end 10 pinned or otherwise anchored within the bore H of a clamphead 12 (Figs. 3 and 5). The clamp head includes a flange 73 whichoverlies and abuts a portion of the body member 8, as shown, and topreclude rotation of the clamp head and idler shaft the clamp head maybe pinned or otherwise fixed to drum l2, as at At its lower end, theidler shaft has a thread 15 to engage the threads of a nut 16 recessedin the drum is clamped tightly by the flange" 13 of the clamp headbearing against the body mem-- her. The upper portion of the spindlehousing may be provided with an extending flange 80 to increase theclamping area of said housing, and to enhance the stability thereofduring the drilling or tapping operations.

It may be noted that in the Fig. 3 form of the device-the spindlehousing is not clamped to the locating. plate, as in Fig. 1. However,itis possi-bleto draw up the locating plate into firm clamping contactwith the lower face 63 of the spindle housing, by means of nuts 6 l ifdesired. This secondary clamping means is considered unnecessary,however, in actual or normal practice.

To adjust the positions of the spindles in the Fig. 3 type of drillhead, the operator loosens the nut 16 of each spindle housing, removesthe 10- cating plate 36', and proceeds as was explained in thedescription of Fig. 1. Different or modified locating plates arerequired for the different spindle position requirements of particulardrilling or tapping jobs. In both forms of the device, it should benoted, the spindle housing at a point directly above the tool holder isadequately backed up by the heavy body member and drum, to avoid theoccurrence of any bending or cocking forces resulting from pressure ofthe tool upon the work-piece. Extreme accuracy of machining is therebyassured.

It is to be understood that various modifications and'changes instructural details of the device may be made, within the scope of theappended claims, without departing from the spirit of the invention.

What is claimed is:

1. In a deviceof the class described, the combination of a heavyplate-like body member having a fiat lower face with anenlargedtransverse bore therein, a circular drum rotatably mounted in the bore,an idler shaft depending from the drum at a point offset from the axisof rotation of the drum, an idler gear on said shaft, a toolcarryingspindle, a spindle housing in the form of a block'abutting the drum,said block having a bore to receive one end of the idler shaft and asecond bore to rotationally support the toolcarrying spindle inparallelism with the idler shaft, said spindle housing block beingrotatable about the axis of the idler shaft to revolve the spindlebodily about theidler shaft in a circular orbit, said spindle housingblock having an upper planar area in fiatwise abutment upon the drum andthe flat lower face of the body member all around the axis of thespindle, a gear on the spindle in mesh with the idler gear, meansincluding a gear disposed centrally of the drum and meshing with theidler gear, for driving the idler gear and the tool-carrying spindle,and means for holding said spindle housing block in position to locatethe tool-carrying spindle relative to a work-piece.

2. In a device of the class described, the combination of a heavy bodymember having a substantially plane face, and bored transversely to forma drum bearing, a circular drum rotatably mounted in the bore, said drumhaving a flat face coplanar with the plane face of the body member, anidler shaft depending from the drum face at a point remote from the axisof rotation of the drum, an idler gear on said shaft, a tool-carryingspindle, an adjustable spindle housing having a bore to receive one endof the idler shaft and a second bore to rotationally support the spindlein parallelism with the idler shaft, said spindle housing beingrotationally adjustable about the axis of the idler shaft to revolve thespindle bodily about the idler shaft-in a circular orbit, said spindlehousing having an upper planar area movable into flatwise abutment uponthe plane faces of the body member and the drum, a portion of said upperplanar area of the spindle housing being disposed substantially aboutthe spindle axis to providesolid backing for the force imposed on thespindle incident to contact of the tool with a work-piece, a gear on thespindle in mesh with the idler gear, means for driving the idler gearand the tool-carrying spindle, and means for holding said spindlehousing in various positions of adjustment relative to the body memher.

3. In a device of the class described, the combination of a heavy bo'dymemberhavin'g a substantially plane face, and bored transversely throughsaid face to form a drum bearing, a circular drum rotatably mounted inthe bore, said drum having a flat face coplana'r'w-ith the plane face ofthe body member, an idler shaft depending from the drum face at a pointremote from theaxis of rotation of the drum, an idler gear on saidshaft, a to'ol-carrying spindle, anadjustable spindle housing having abore to receive one end of the idler shaft and a second bore inwhi'chth'e spindle rotates in parallelism with-the idler shaft, saidspindle housing being rotationally adjustable about the axis of theidler shaft to revolve the spindle bodily aboutthe idler shaft in-acircular orbit, said spindle housing having an upper planar'area movableinto flatwise abutment upon the plane faces of the body member and thedrum, a gear on the spindle in mesh with the idler gear, means fordriving the'idler gear and the spindle, and releasable means includingthe idler shaft for clamping the spindle housing firmly relative to thebody member.

4. In a device of the class described, the combination of a heavy bodymember having a'substantially "plane face, and bored transverselythrough said face 'to form a drum'bearing a circular drum 'rotatablyino'unted in the bore, said drum having a flat face co-pl'anar with theplane face of the body "member-yanidler shaft depending from the drumfaceiat a point remote from the axis of rotation of the' drum, an idler'gearon said shaft, a tool-"carrying spindle,:an adjustable spindlehousing havingabore to? receive one end of'the idler shaftand'aseeondbore in which the spindle rotates in parallelism with the idler shaft,said spindle housing being rotationally adjustable about the axis of theidler shaft to revolve the spindle bodily about the idler shaft in acircular orbit, said spindle housing having an upper planar areamovable'intoflatwise -abutment/upon the plane faces of the body memberand the drum, a gear on the spindle 'in'mesh with "the idler gear, meansfordriving the idler gearand the spindle, a rigid spindle locating,plate normally fixed relative to the body member in substantialabutment withthespindle housing, and releasable means for clamping thespindle housin'g securely to 'said'lo'cating'plate.

5. Ina'device of the class described,-the-'combination of a heavy bodymemberhaving a substantially plane face, and bored transversely throughsaid face'to forma drumb'earin'gfa circular drum rotatably mounted'in'the'b'ore, said drum having a flat faceeopl'anar with the plane face ofthe body membe'nan idler'shaftdepending from the drufn -fa'ce at a point-remote:from the axis of rotation cf tlie drum, an: idlergearbn saidshaft, a tool-carrying spindle, an adjustable spindle housing in theform of a single block contacting the body member, and having a bore toreceiveon'e end of the idler shaft and a second bore in which thespindle rotates in parallelism with the idler shaft, said spindlehousing being rotationally adjustable about the axis of the idler shaftwhile the drum is stationary, to revolve the spindle bodily about theidler shaft in a circular orbit, said spindle housing having an upperplanar area movable into flatwise abutment upon the plane faces of thebody member and the drum, a gear on the spindle in mesh with the idlergear, means for driving the idler gear and the spindle, and releasablemeans for clamping the spindle housing firmly relative to the bodymember.

6. In a device of the class described, the combination of a heavy bodymember having a substantially plane face, and bored transversely throughsaid face to form a drum bearing, a circular drum rotatably mounted inthe bore, said drum having a fiat face coplanar with the plane face ofthe body member, an idler shaft depending from the drum face at a pointremote from the axis-of rotation of the drum, an idler gear on saidshaft, a tool-carrying spindle, an adjustable spindle housing in theform of a single block contacting the body member, and having a bore toreceive one end of the idler shaft and a second bore in which thespindle rotates in parallelism with the idler shaft, said spindlehousing being rotationally adjustable about the axis of the idler shaftwhile the drum is stationary, to revolve the spindle bodily about theidler shaft in a circular orbit, said spindle housing having an upperplanar area movable'into flatwise abutment upon the plane faces of thebody member and the drum, a gear on the spindle in mesh with the idlerigean mea-ns for driving the idler gear and the spindle, and releasablemeans for fixing the spindle :housing against shifting from its adjustedposition.

'7. An adjustable multiple spindle head of the character described,comprising in combination, a heavy body member having a substantiallyflat lower face, a central portion, and a plurality of enlarged bores inthe lower face disposed on centers spaced from the central portion-ofthe body member, acircular drum rotatively mounted in each-bore, saiddrumshaving flat faces coplanar with the flat lower face of the bodymember, a plurality of rigid-one-Vpiece tool spindle housings eachmounted eccentrically upon a drum .for swinging adjustment relative 'tothe drum in physical contact with its'drum and withan adjacent-areaofthe body member lowerface, whereby'aportion of the drum and a portionofthe body member are spanned by the tool spindle housing in contacttherewith, a tool-carrying spindle rotatably-supported by each spindlehousing, drive means for simultaneously rotating all of the spindles,and releasable means formaintaining thetool spindle housings in fixedpositions of adjustment relative to the bodymember.

B. An adjustablelmultiplespindle head'of the character described,comprising'in combination, a heavy-body member havlng'a substantiallyflat lower face, a central portion, "and "a plurality of enlarged boresin the lower facedisposed on centers spaced .from'the central portion ofthe body member, a'circular drum 'rotatively mounted in each bore,'saididrums'havingflat faces coplanar with the hat lower fa'ce'of thebody membena ,75 plurality "of rigid tone-piece tool spindle housingseach mounted eccentrically upon a drum for swinging adjustment relativeto the drum in physical contact with its drum and with an adjacent areaof the body member lower face, whereby a portion of the drum and aportion of the body member are spanned-bythe tool spindle housing incontact theiewith,-'an apertured locating plate releasably fixedrelative to the body member in substantial parallelism therewith, atool-carrying'spindle rotatably supported by each spindle housing andpassing through a locating plate aperture, releasable means formaintaining the tool spindle housings in fixed positions of adjustmentrelative to said locating plate, and drive means for rotating at leastsome of said spindles.

9. An adjustable multiple spindle head of the character described,comprising in combination, a heavy body member having a substantiallyfiat lower face, a central portion, and a plurality of enlarged bores inthe lower face disposed on centers spaced from the central portion ofthe body member, a circular drum rotatively mounted in each bore, saiddrums having fiat faces coplanar with the fiat lower face of the bodymember, a plurality of adjustable too1 spindle housings each mountedeccentrically upon a drum for swinging movement in physical contact withits drum and with an adjacent area of the body member lower face,whereby a portion of the drum and a portion of the body member arespanned by the tool spindle housing in contact therewith, an aperturedlocating plate releasably fixed relative to the body member insubstantial parallelism therewith, a tool-carrying spindle rotatablysupported by each spindle housing and passing through a locating plateaperture, drive means for rotating at least some of said spindles, andreleasable means for clamping the spindle housings firmly to saidlocating plate.

10. An adjustable multiple spindle head of the character described,comprising in combination, a heavy body member having a substantiallyflat lower face, a central portion, and a plurality of enlarged bores inthe lower face disposed on centers spaced from the central portion ofthe body member, a circular drum rotatively mounted in each bore formovement to predetermined positions of adjustment, a plurality ofadjustable tool spindle housings each pivotally mounted upon a drumremotely from the center of the latter, a tool-carrying spindlesupported by each spindle housing at a point remote from the pivotalmounting aforesaid, and means including a main shaft rotativelysupported upon the body member, for actuating said spindles.

11. An adjustable multiple spindle head of the character described,comprising in combination, a heavy body member having a substantiallyflat lower face, a central portion, and a plurality of enlarged bores inthe lower face disposed on centers spaced from the central portion ofthe body member, a circular drum rotatively mounted in each bore formovement to predetermined positions of adjustment, a plurality ofadjustable too1 spindle housings each pivotally mounted upon a drumremotely from the center of the latter, an apertured 1ocating plateremovably fixed relative to the body member in substantial parallelismtherewith, a tool-carrying spindle supported by each spindle housing andpassing through a loeating plate aperture, releasable means formaintaining the spindle housings in fixed positions of adjustmentrelative to said locating plate, and means for actuating at least someof said, spindles.

12. An adjustable multiple spindle head of the character described,comprising in combination,

a heavy body member having a substantially flat lower face, a centralportion, and. a plurality of enlarged bores in the lower face disposedon centers spaced from the central portion of the body member, acircular drum rotatively-mounted in each bore for movement topredetermined positions of adjustment, a plurality of adjustable toolspindle housings each pivotally mounted upon'a drum remotely from thecenter of the latter, an apertured locating plate removably fixedrelative to the body member in substantial parallelism therewith, atool-carrying spindle'supported by each spindle housing and passingthrough a locating plate aperture, releasable means for firmly clampingthe spindle housings 'to 's'a'id locating plate, and means for actuatingat least some of said spindles.

13, An adjustable tool head for application to a reciprocable ram-likeelement of a machine, comprising in combination, a body member forattachment to the ram-like element, a rotatable member mounted upon thebody member for movement to different positions of adjustment thereon,an adjustable tool-supporting element, and means pivotally mounting thetool-supporting element upon the rotatable member at a point remote fromthe axis of rotation of the latter, and means mounting a tool upon thetool-supporting element at a point remote from the mountin pivotaforesaid. k

14. In a device of the class described, the combination of a heavyplate-like body having a transverse bore therein, a rotationallyadjustable member in said bore, an idler shaft depending from saidrotationally adjustable member at a point offset from the axis ofrotation thereof, an idler gear on said shaft, a tool-carrying spindle,a spindle housing revolvable about the idler shaft, with the spindleoffset from the idler shaft and disposed at right angles to theplate-like body of the device, means for driving the idler gear and thespindle, and means providing a solid backing between the spindle andsaid plate-like body, to avoid cooking of the spindle from itsrightangular relationship with the plate-like body as force is appliedaxially to the spindle incident to movement thereof toward a work-piece.

15. An adjustable tool head for application to a reciprocable ram-likeelement of a machine, comprising in combination, a body member forattachment to the ram-like element, a rotatable member mounted upon thebody member for movement to diiferent positions of rotary adjustmentthereon, an adjustable tool-supporting element having an upper face tosubstantially fiatly contact and bear directly upon the body memleer,means pivotally mounting the tool-supporting element upon the rotatablemember at a pointremote from the axis of rotation of the latter, andmeans mounting a tool upon the toolsupporting element at a point remotefrom the mounting pivot aforesaid.

16. An adjustable tool head for application to a reciprocableram-likeelement of a machine, comprising in combination, a body memberfor V attachment to the ram-like element, a rotatable member mountedupon the body member for movement to different positions of rotaryadjust ment thereon, an adjustable tool-supporting element having anupper face to substantially flatly contact and bear directly upon thebody member,

remote from the axis of rotation of the latter, and means mounting atool upon the tool-supporting element, with the axis of the toolstriking the body member within the area of bearingcontact of thetool-supporting element upon the body member.

17. An adjustable tool head for application to a reciprocable ram-likeelement of a machine, comprising in combination, a body member forattachment to the ram-like element, a rotatable member mounted upon thebody member for movement to diiferent positions of rotary adjustmentthereon, an adjustable tool-supporting element having an upper face tosubstantially flatly contact and :bear directly upon the body member,means pivotally mounting the tool-supporting element up on the rotatablemember at a point remote from the axis of rotation of the 12 letter, andmeans mounting a tool upon the toolsupporting element, with the axis ofthe tool striking the body member within the area of bearing contact ofthe tool-supporting element upon the body member, a tool-supportingelement locating member normally fixed relative to the body member, andmeans for selectively anchoring the too1-supporting element to said 10-cating member.

ALFRED P. SPECKIN.

REFERENCES/CITED UNITED STATES PATENTS Name Date Schultz May 18, 1948Number

